Thanks for the compliments Chris. I'm happy to hear you like the lil guy. I sourced the pen light torches from Amazon. They run on a single 1.5v AAA battery and are pretty bright for their size, so I stripped them, soldered some wires to the terminals, and wired them in parallel through a drop down buck converter and relay that Richard R put me on to, which are connected to a digital port on the EZ-B. The retract mechanism was made from two dried out marker pens, a cut length of metal coat hanger wire which are linked to a HD servo with a servo horn. I put up a couple of pics so you can have a better look.